Originally Posted by
sam86
Veigar, an old champ, can counter Katarina
Except Cass, any mage with hard CC can stop Katarina mid, Karthus is one of best squishy target in game and he is a punch bag for most champs, unless he get babysit by jungler (and it is easy to babysit mid, lot of potential ganks, and his slow make ganks killer with flash not on cd)
Katarina need mobility, any enemy who counter mobility (Brand will E+Q+W her if she tries to Q+E+W him, his dmg will be more) counter her basically, she still however has a very good early game specially she can just Q and do nothing else until you get low hp, her Q is just cd and cost no mana